Chord Distribution Analysis

Chord SymbolCountFrequency
Cmaj7210.5%
F7210.5%
Em7210.5%
Am7210.5%
C7210.5%
Eb0715.3%
Dm715.3%
G715.3%

Key Patterns Detected

PatternFunctionFrequency
Cmaj7 -> F7Setup (Major Key)1
Dm7 -> G7Setup (Major Key)1
G7 -> Cmaj7Resolution (Major)1
E7b9 -> Am7Resolution (Minor)1
C7 -> Gm7Resolution (Minor)1
Gm7 -> C7Setup (Major Key)1

Harmonic Highlights

  • The progression features a classic chromatic descending line (iiim7 - bIII°7 - iim7) using Eb°7 to bridge the gap between Em7 and Dm7.
  • Incorporation of the IV7 (F7) in a major context provides a bluesy, Lydian Dominant flavor that departs briefly from pure diatonicism.
  • Secondary dominants, specifically E7b9 leading to Am7 (V/vi), create temporary shifts to the relative minor, adding emotional weight to the bridge.
  • Use of Ab7 (bVI7) acts as a backdoor dominant or tritone substitute, facilitating smooth voice-leading back toward the tonic.

Improvisation Focus Guide tone targeting (3rds and 7ths) to highlight the shifting extensions over the ii-V-I cells and chromatic passing chords.

Difficulty Rating 2/5; the harmonic rhythm is relaxed and the piece stays primarily in C major, making it accessible for players practicing basic functional substitutions.


📚 Standard Available in:

The Real Book - Volume VI
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